Fix tests

Full Changelog: v0.6.0...v0.6.1

Support for Python 3.10!

Full Changelog: v0.5.2...v0.6.0

Relax `tessa` requirement

v0.5.2

Relax `tessa` requirement, bump version

Update to latest tessa version

Now requires tessa >= v0.5.0 in order to benefit from all kinds of fixes and performance improvements

Use tessa instead of investpy for live price information

• Replace investpy with tessa. (Note that tessa now uses yfinance instead of investpy.)

Rename, refactor, etc.

• Add networked test for investpy_xpme.
• Rename investpy functions to investpy_xpme and investpy_verbose_xpme.
• Add and expose helper function pick_prices_from_dataframe.
• Recategorize from library to package.
• Simplify some code.

Support for real-time prices based on `investpy`

• Add mod_investpy_pme module with investpy_pme and
  investpy_verbose_pme using investpy module, which uses
  Investing.com as the data source.
• Also, fix a couple of issues with hypothesis testing and making sure
  the input dates are sorted.

Patch release

Fix images

Patch release

Add more info for PyPI

Patch release

Include license file